Buried deep within Nokia's press release about its financial results, there's a line that pretty much signals the end of one of the most popular and successful mobile operating systems in history. With Nokia retiring its use, Symbian is no more.

"Excluding NSN, Nokia continued to burn cash in the fourth quarter, at a rate which is likely to increase in Q1”

“Cutting the dividend helps Nokia’s liquidity and they should have done it a year ago,” said Ping Zhao, an analyst at CreditSights Inc. in New York. “They need to cut costs further. Even though they made progress, the smartphone is nowhere near turnaround. It’s going to be a long and hard slog for them to get back.”